Means for recovering dust and other materials.



, v c. E; eoonmcn. v MEANS'FOR REGOVEBING DUST AND OTHER MATERIALS.

APPLIGATIOK FILED JULY 17, 1911. v

. Patented 0013. 15, 1912.

2 SHEETSSHBET 1.

F VD

I lla/165E Gmdricfi G. B. GOODRFJH. MEANS FOR REOOVEBING DUST AND OTHER MATERIALS.

APPLIGATIQEI? FILED 3ULY17,1911. 1,041,617.

2 SHEET HEET 2..

WWW-ewes anemia Eaiente Get-15 E912,

- @NIEED STATES PATENT OFFICE;

CHAR/113$ GOODRICI-I, OF DAG-GETT. CALIFORNIA MEAN? FOR RECOVERING DUSS'I AND OTHER MATERIALS.

LOlLtSlTF.

To all whom it may concern:

Be it known that I. Crux-mes E. Gooonicr-r, a citizen of the United States, residing at Daggett, in the county of San Bernardino and State of California, have new and useful Means for Recovering Dust and other Haterials, of which the following is a speeiliration.

This invention has reference to improvefor recovering dust and other materials usually carried off in the stack of roastintt or calcining furnaces or kilns. or the ii and its object to pror the recovery of materials in dustv ide [like form, er in the yolatilized state which and in the treatment of lime and other material, and a consid rable portion of the fine pulp is carried oil )5. the hot gases of combustion under the action of the strong draft neces arv to properlyv promote the combustion of the fuel used in the reduction of such substances. I

lit the smelting of ores not only is there a loss of material by the escape of the fine pulp called fine dust, but u an of the valuable metals of the ores are extremely volaform of line dust or in volatilized form, are

directed. and water is directed against them screens in such manner that the hot gases of combustion "with materials carried thereby are progressively cooled until ultimately he materials re trapped. by the water and Specificationof Letters Patent.

Application filed July 17, 1911,

invented a Patented Oct. 15,1912 Serial No. 639,047.

finallyv carried to a point of escape to be conducted therefrom to a suitable point of treatment for the recovery of the saved materials from the. water. I

After passing through the extracting portlon of the by-pass, the lean gases of combustion mayreturn to the stack to pass out of the same in the usual manner. In order to promote the draft through the collecting portion of the by-pass, a suitable fan is provided, sothat the natural draft of the stack is supplemented by such fan. Of

'ccurse, instead of returning the lcleansed or lean gases to the stack, the gases may be discharged directly into the atmosphere from the fan.

The invention wn be best understood from a consideration of the following de- I tailed description, taken in connection with the accompanying drawings forming a part i of this specification, with the understandmg, however, that the showing of the drawings illustrate but a single embodiment of the invention, which, however, is not the only practical form the invention may as sume, for different conditions demand changes and modifications to meet them, while the salient features of the invention are still retained.

' In the drawings :-Figure l is a longitudinal section in substantially the line of the axis of the separator portion of the structure where the separator is included in a bypass in a stack. Fig. 2 is a section on the line 2-2 of Fig. l with some distant parts omitted. Fig. 3 a. section on the line 33 of Fig. 1. s

Referring to the drawings, there is shown a stack 1 without any attempt to indicate relative proportions, so that the stack may be t: ken as simply indicative of any stack for any reducing furnace wherein there is a liability of losses by the escape of fine dust or volatilized values or both through the stack because of the draft or blast. The stack is provided at an appropriate pointwith a damper 2; On one side of the damper. that is on the side of the damper toward the furnace, the stack is provided with a collar 3, the interior of which communicates with the interior of the stack, and on the other side of the damper there is an- "diameter about equal to the inner diameter of the casing 6 at the respective ring. In the drawings there are shown sir screens and six supporting rings, there being three screens on one side of the central portion 7 and three screens on the other side thereof, but the'particular number of screens will depend upon the conditions to be met in each particular instance, and no definite instructions can he given for an installation witliout information as to the conditions present.

The showing of the drawings is, therefore,

in this respect largely indicative and the particular form and disposition of the cusings 6 is also largely indicative.-

Fora purpose which will presently ap pear, the mesh of the screens may be progressively finer or smaller from the intake end of the casing 6, which is the end ente ing the collar 3, to the exit end of the casing, which is the end provided with the neck 8. Each screen, which. in the practi cal form of the invention is a metallic screen, carries at its center a journal 11, the

pipe 15 extending radially with reference to the shaft 1.4 to a point adjacent the corresponding portion of the inner wall of the casing 6. Each pipe 15 the end remote from the socket 14: is closed by a suitable cap 16; The hollow shaft 12 is provided with an appropriate number of passages 16 through; its walls matching the necks 14; and pipes 15, so that the interior of the shaft is in, connnunication with all the pipes.

That end. of the shaft 12 toward the neck 8 enters a hollow bearing 17 through a stuffing hex 18, so that the shaft may turn on its longitudinal axis but still leakage be prevented by the stulling box; The bearing 17 has its interior connected to a pipe 18, which in turn has another pipe 19 branched oil therefrom with an interposed valve 20, and between the pipe 11') and the hearing 17 the :mther "h an in Ni. with.

pipe 21 branched oil available an electric motor would constitute such means.

The sew V. perforations 30 directed to ard the scimno 10 and by int-roduciup watc from .1: 1 source of supply by way of the pi the pipe 18 and through the hearing 17 inio the pipe 12- strcams of water may he directed against the faces of the screens 10 presented toward the stack and by imparting a rotative movement to the shaft 12, these streams may-be caused. to sweep over the screens The neck 8 is connected to the intakcof a fan, or blower 81 having a shaft 32 provided with tight and loose pulleys 33, 34;, respectively, for the application of power and which may be taken simply as indicative of any means for rotating the fan, which means where electric current is available would be an electric motor.

The fan 31 may be of any form best adapted for the purpose and no attempt is made to show particular type of fan, nor is the invention lin'iited in any manner to any particular typepf fan, The fan 31 dis charges into a flue which is carriedt-o the neck 4 and in turn discharges into the stack 1 above the damper 2. i

The casing 6 is supported upon a suitable framework 37 which need not he described in detail, and the connecting section 7 of the casing (i is formed with an outlet 38 at the bottom portion, so that water will readily gravitate to this point, it being under stood that the longitiulinal axis of the easing' 6 is usually arranged substantially horizontal. Each ring 9 at the point which constitutes the lower portion of the ring is formed with a cut away portion 219, so that water gravitating to the lower porlici'i of the casing may tin d ready rough the cut away portion Elf) of th to the an-ti an of the casing next lo to the ring until ultin'iately the outlet reached, which outlet assumed to be connected to any point of disposal of the water flowing through; such outlet.

\Vheh the damper l' f conih -is closed, and the exhaust moving parts of the colleen-=2 previously set. in motion, a H created by the fan, causing combustion and any materia (3 and ultimately into the line to be re turned to the stack above the damper through the neck l.

lVhen the parts are set in. motion, Water is directed intothe hollow shaft 12 by way of the pipes 18 and 19 by opening the valve 20, and the shaft 12 being given a rotative movement by the rotation of the countershaft 24 acting through the sprocket wheels 23 and 26 and chain 27 will cause streams of water to fioiv through the openingsor perforations '30 on to the screens, all parts of the screens being reached by the jetsof Water because of the rotative movement of the shaft 12 and the pipes 15 carried thereby.

Those products of combustion which reach the first screen in order are very hot and the, water deposited on this screen from the adiacent pipes 15 is converted into steam, and

. 1f the products of combustion be hot enough,

into dry steam, but the conversion of the water mto steam has caused a cooling and contraction of the hot gases, which on reach- .ing the second screen are further cooled and contracted, and the water on the second screen if the gases be still hot-enough is converted-into steam, butthis steam may be wet steam, so that by the time the third screen is reached, there is more or less condensation of the steam, and before the final screen is reached the steam has all been con densed and any volatile matter initially carried by the hot gases of combustion has likewise been condensed and if soluble has become dlssolvedln the condensed steam and water thrown on the screens from the pipes 15,.while the fincdust carried by the exhaust gases has been caught by the water and the latter with the entrapped dustiand entrapped or dissolved matters initially volatilized and directed into the stack gravitate down the inclined bottom of the casing (3 through the passages or cut away portions "39 and finally reach an escape by 'ay of the outlet 38, and the water so escaping with the materials carried thereby may be directed to settling tanks or separatingapparatus, whereby the materials carried by the water may be recovered. The comparatively cool and lean gases reaching the fan will be discharged by the latter into the flue 35 and directed into the stack above the damper 2.

If the separator be installed at some distancefrom the furnace, the gases may have coolcds'o that no steam will be generated at entrance of the gases into the (:hlII-g ('3 with the precipitation of the dust upon the screensl ucctcel by i leltz'.l drat't of" th. stack will aid the fan in by to pass through the interior of the casing withdrz-iwing the gases from the stack below the damper.

At times the screens become choked in whole or in part with accmnulations M'llh'll are not readily soluble in water and which are not easily washed away from the screens by the water jets ordinarily impinging thereon; Under these circumstances the valve 20 may be closed and the valve 22 opened, the pipe 21 being connected to' a source of steam under high pressure and jets of steam may be directed against the screens, thoroughly cleansing or scouring them.

,Not only may the screens be of progressively finer mesh from the entrance to the exit ends of the casing 6, but the outlets in the pipes 15 and the number of pipes 15 in relationto the respective screens may vary. Asan examplqthe first hole in a certain branch pipe 15 of'anyof theserics of the pipes may be placed say, six inches from the center of the stream,- the second hole or perforation one foot therefrom. the third perforation eighteen inches, and so on. The second pipe will then have the'first hole seven and one-half inches from the center, the second thirteen and one-half inches, the third hole nineteen and ('ine-half inches. and so on. The third pipe will have the first. hole nine inches from the center, and the fourth pipe ten and one-half inches center. to center, the remainingh'oles in each pipe being spaced six inches apart. These figures are merely given as examples. and are not at all mandatory and the invention is by no means limited to any exact conformity with these figures;

Since the first screen is hottest portion of the gases it may be provided with a greater number ot'ln'anchor radial pipes The first screen may have four ofthese brsnch pipes. Further on to-- ward the discharge end the number of branch pipes may be reduced to three. while the finest screen may have but' one branch pipe 15 in operative relation thereto" These particular proportions are not at all mandatory and are given by war of example only.- without limitation of the invcntionto any such arrangement.

, It will, of course, be understood that suitable means for'acccss tothe interior of the casing are provided but it is deemed 1111* necessary to showany such means as the usual practice of such cases may be tollowcd.

ll'hat claimed is 1. A means for the purpose described comprising an elongated conduit for the passage of products of combustion (:HI'XHIQ lllulLIlulS to be extracted therefrom, said tion to he progr procucts oi QOllllJllShlOir,

conduit having is stantially horizon-t ralil v of spaced, tionarjr screens in com ile ch," across tending t .v.. d in posiavcrsed by the and Water directing means on the side of ea screen toward the oncoming products of combustion and re-- lated to said screens to forcibly direct streams of Water against and through 'the screens over substantially their entire areas in substantially the direction of the long-rm tudinal axis of the conduit, said conduit being provided with means for the escape of water to .malntain the conduit free from accumulations of water.

2. A means for the purpose described comprising an elongated conduit for the passage of the products of coi'nhusticn, carrying materials to be extracted thcretrom,

Said conduit having its longitudinal axis substantially horizontal. when 111 use, a pinrality of soaced, substantially upright screens in said conduit in transverse rein;- tion thereto and in position to be pro ecsirely traversed by the products of combusl'ion. and rotative Water directing means on the side of each screen toward the oncoming products of combustion, said Water directing means being related to the screens to direct streams of Water against and through the screens in substantially the direction of the longitudinal axis of the conduit.

3. A means for the purpose described comprising an elongated conduit having its longitudinal axis substantially horizontal when in installed position, a series of spaced and substantially uprightscrcens extending entirely across the conduit and progressively increasing in fineness from the entrance of the conduit toward the exit end thereof, and

Water directing means adj acent those faces of the screens toward the entrance end 01'? the conduit and positioned to project strean'is of water against and through the screens in the se me direction as the travel of the products of combustion therethrougl'i.

4. A means for the purpose described comprising a conduit for the passage of products of combustion containing materials to be extracted therefrom, a series of spaced screens in the conduit in transverse relation to the length thereof, and means for directing streams or water thrru h the screens in the same direction l oi the prod nets of conihnstic l r, the capacityoi said last named means to direct water through the ""eens being greater at those screens adjac' t the entrance to the conduit than at those screens adjacent the exit end oi the conduit.

5. The combination with a furnace stack, oi": a substantially horizontally argod conduit connected at the opposite our to the stack at spaced points of the latter, said conduit containing a series of substantially upright previous screens spaced apart in the direction of the length of the conduit and each extending Wholly across the conduit, and means for forcibly projecting streams of Water against each screen over substantially the Whole surface of such screen in.

the direction of movement of: the products of combustion through the screen, the conduit having means for the escape of Water therefrom at a point below the lowest part of any of the screens 6. means for the purpose described comprising a conduit, a series of screens tlp tlfietl apart in the direction of the length. oi the con (hill: with each screen in trans\"erse relation to the conduit, said screens in-- creasing in fineness from the entramc toward the exit end of the conduit, and ro ve' means for directing streams of fluid against the screens, said rotative means being of a capacity to direct more streams of Water against those screens adjacent the en trance of the conduit than against those screens adjacent the exit end of the conduit.

7. A means for the purpose described comprising a casing having Walls declining toward an outlet point, screens Within the casing in transverse relation to the length of the casing, said screens increasing in lineness from one end of thecas'ing toward the other, a rotatable hollow shaitt extending through, the screens, and radial hollow arms carried by and communicating with the interior of the sh it adjacent the screens, each arm being 4 "ided with perihn-ations or passages oi'reci'cd toward the respect screen, the arms being more numerous ad comprising a casing having Walls declining toward an outlet point, screens Within the casing in transverse relation to thclcugth of the casing, said screens increasing in line ness from one end of the casing toward the other, a rotatable hollow shaft extending through the screens, radial hollow arms carried by and communicating with the intcrior oi? the shaft adjacent the screens, each arm being provided with perforations or passages directed toward the respective screen, the arms being more numerous adjacent the screens of larger mesh than adjacent the sc :cus ot smaller mesh, means for inniart rotati've movement to the shaft, and an eahaust tan communicatingwith that end of the casing remote from the screens of coarser mesh.

The combination with a furnace stack, of a casing connected at one thereto, said casing increasing in dian'ictor toward t1 ecenter and their "idccreasine other end and prf 'idcd with an,

in diameter l. ll 0 outlet at an intermediate point, a series of screens spaced apart in the direction of the length of the casing and extending trans.- versely of said casing, the screens being of progressively smaller mesh in a direction away from the stack, journal bearings carried by each screen in the longitudinal axis of the. casing, a hollow shaft extending through the screens and mounted in the journal bearings, hollow arms or pipes carried by the hollow shaft in radial-relation thereto and adjacent the faces of the screens directed toward the stack, each pipe being provided with perforations. or passages directed toward the respective screen, means for directing fluid into the hollow shaft,

means forrotating the hollow shaft, an eX- haust fan communicating with the end of the casing remote from the stack, and a flue connectedwiththe discharge end of the fan and also connected with the stack, said stack being provided with a valve or damper between the ointof connection of the casinfi D and the point of connection of the flue from the fan with said stack.

"10. The combination with a furnace stack,

of 'a substantially horizontal conduit for "gases of combustion communicating at its opposite ends with the stack at spaced points thereof, stationary pervious screens in the conduit extending wholly across the conduit in transverse relation thereto and of a fineness to tend to retain'water, means for directing gases of combustion from the stack througl'i the conduit, and means for forcibly directing water against and through those faces of the screens toward the entrance end of the conduit and in the direction of flow of gases through the conduit, said water directing means being active over substantially the entire areaof each screen, and the conduit being provided with means for the escape of water therefrom at a point below the lowest part of the screens.

11.. The combination with a'furnace stack, of a substantially horizontal conduit for gases of combustion communicating with the stack at spaced points thereof, pervious screens in the conduit in transverse relation thereto and of a fineness to tendto retain water, means for directing gases of combustion through the conduit from the stack, and

means for directing water against and through those faces of the screens toward the entrance end of the conduit and in the direction of flow of gases through the conduit, the water directing means being mounted for rotation about an axis coincident with the longitudinal-axis of the conduit.

In" testimony that I claim the foregoing as my own, I have hereto affi red my signature in the presence of two'witnesse's.

CHARLES EBENEZER GQODRICH.

Witnesses:

Gno. B; HART, J. H. FLINT. 

